METHOD OF INCREASING HYDROPHOBIC PROPERTIES OF PLANAR LAYER OF POLYMERIC NANOFIBRES, A LAYER OF POLYMERIC NANOFIBRES WITH INCREASED HYDROPHOBIC PROPERTIES, AND A LAYERED TEXTILE COMPOSITE CONTAINING SUCH LAYER

摘要

The invention relates to a method of increasing hydrophobic properties of planar layer of polymeric nanofibres, by which a hydrophobic agent is applied to surface of the layer or into its entire structure, while during application of the hydrophobic agent is on the layer of polymeric nanofibres acted from at least one side by at least one supporting air stream and/or after application of the hydrophobic agent is on the layer of polymeric nanofibres acted from at least one side by an air stream, which removes the hydrophobic agent from the surface of the layer of polymeric nanofibres on this respective side of it into the inter-fibrous spaces in its inner structure. During and/or after that, is on the layer of polymeric nanofibres acted by increased temperature, which is lower than the melting temperature of the polymer of the nanofibres, as a result of which the hydrophobic agent contained in it dries out and coagulates, whereby at least some inter-fibrous spaces of the layer of polymeric nanofibres are entirely filled up with the hydrophobic agent in solid state and the polymeric nanofibres get fixed against mutual slipping. The invention also relates to a planar layer of polymeric nanofibres, the hydrophobic properties of which was increased by the described method, as well as to a textile composite containing such layer of polymeric nanofibres.